That is correct, but in comparison this is looks a lot more than just modified. It even has a visible power source on it, in contrast to Ferrus' Forgebreaker. I do accept it as modified, but i feel like they overdid it.

I would agree with you, it does fit him and the original does fit the fact that Fulgrim made it, but as it stands i feel like it's too different from the original. As it is here it looks more like a reforged version whereas it should just have been modified. I'm not saying i like one version over the other though.